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Moliner Brotons, A. (author)In high-precision complex mechatronic devices, specifications are mostly affected by the contribution of several disciplines. Thus, in order to facilitate the fulfilment of the specifications, it is crucial to have a well-defined requirement for each sub-system during the entire design process. Model based system engineering (MBSE) is a...master thesis 2021
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van de Sande, Willem (author)A wavelength modulated interferometer is presented, based on a telecom laser source. A solution for the target distance dependency of wavelength modulated interferometers is presented. With the introduction of a delay line, the modulation depth variation is reduced. A method and a sensor head for the reduction of the thermal dependency of this...master thesis 2021
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Ligthart, Max (author)This study focuses on investigating an alternative validation method to validate the compressor side of turbochargers. Nowadays, the performance of turbochargers is tested using hot gas stands. These hot gas stands are expensive. The application of an externally coupled e-motor to the turbocharger eliminates the need for a hot gas burner -...master thesis 2021
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Alvarez, Marcos (author)The 3D-digitisation of precious cultural heritage artifacts is highly important for historical preservation purposes. Doing so can help mitigate against events such as tourism damage, natural disasters, and war. It also enables access to three-dimensional data for researchers of all disciplines all around the globe to study these artifacts at...master thesis 2021
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Spierings, Jan (author)In orthopaedic and dental surgery, bone grafts are used by surgeons as substitutes for the patient’s own bone. A bone graft provides support to the skeletal structure and stimulates the ingrowth of new bone. There is a growing demand for bone grafts due to an increasing world population and an ageing demographic. Tissue banks produce bone grafts...master thesis 2021
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Wouters, Max (author)Vibration energy harvesters are especially interesting to use in an environment where there is one dominant vibration frequency present because then the harvesters can be designed to resonate at that specific frequency. To spread out the power yield over more frequencies a multi-modal harvester can be used which can resonate at multiple...master thesis 2021
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Argiro, Rafael (author)The ever increasing demand for better and cheaper electronic devices, sensors, optical components, etc. fuels innovation in nanometer precision positioning machines. However, the overall architecture of these machines has not changed much over the past years. A huge improvement in the architecture is currently impossible due to a crucial element...master thesis 2021
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van den Berg, Ronald (author)Cryogenic electron tomography (cryo-ET) is currently the golden standard for imaging cellular tissue at nanometer resolution. The current workflow from cultured cells to final image is however very time-consuming, labor-intensive, expensive, and has a low yield. Moreover, many of the steps in this workflow require practice. Even after practice,...master thesis 2021
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Kramer, Timothy (author)Nowadays, low-duty CNC machines use the conventional belt-driven system, which works well for relatively small machines. However this design brings several complications the engineer has to account for: creep; backlash; complex assembly and more importantly the limited stiffness of the belt. This limited stiffness results in belt stretch and...master thesis 2020
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Roos, Joeri (author)Vibration energy harvesting can become a durable source of energy for wireless<br/>sensors or other low power applications like pacemakers. Huge savings in ecological footprint, production and maintenance costs can be achieved by replacing batteries for vibration energy harvesters. Most of the time, newly developed energy harvesters are tested...master thesis 2020
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van der Laan, Jorik (author)Bone drilling is a crucial part of orthopaedic surgery. Internal fixation is a ommon orthopaedic procedure that requires drilling to improve healing of bone fractures. Tight spaces around hard to reach bone fractures impede the surgeon during the procedure. As a result there is an increased risk of complications such as thermonecrosis, overshoot...master thesis 2020
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Kan, Chi Wai (author)As technology is advancing, the need for precision stages is increasing. These stages are being used with (electron) microscopes for scientific research and industrial applications. They can be operated manually or by actuators, where the motorized stages are quite expensive in general and the cost increase significantly if better performance is...master thesis 2020
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van den Hurk, Maurits (author)Flex-on-substrate assembly is an increasingly popular electronics assembly type that is based on thermocompression bonding: a combination of high temperature and pressure. Currently, up to two-thirds of the cycle time is spent on heating and cooling. To meet the growing demand for flex-on-substrate production in the future, the heating and...master thesis 2020
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van den Toorn, Stefan (author)Stick-slip friction is the resulting effect of the transition between the dynamic and static friction coefficient. This effect determines the minimal sustained speed and minimal incremental motion of a movement system, limiting the performance in precise positioning systems. Available bearing types without stick-slip suffer from complexity, high...master thesis 2020
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Kooper, Martin (author)This report presents a new filter wheel design for use in space-based optical systems. The design integrates a hybrid linear stepper motor into the wheel's rim to generate rotation, leading to a Rotating Hybrid Linear Stepper Motor (RHLSM). Unpowered this motor generates a holding force that can keep the wheel in position during system...master thesis 2019
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Jutte, Wouter (author)The application of actively controlled micrometer precision positioning stages in products that are accessible to start-ups, individual consumers or third world countries is currently limited by their price and size. To solve this problem, the use of low-cost and compact components in stages is investigated. Earlier research done in the MSD...master thesis 2019
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van Haren, Bob (author)In this MSc thesis report, the process of developing a laser aiming solution for the purpose of bird repelling will be described. This process consists roughly of five phases: Setting up requirements, generating concepts, picking and developing a single concept, building and finally testing this concept.<br/><br/>The current laser aiming...master thesis 2018
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Brouwer, Andreas (author)Proton therapy is an increasingly popular form of radiotherapy that uses high energy protons for the treatment of cancer. It results in a lower integral dose than the classical photon radiotherapy. This makes it suitable for the treatment of tumors close to critical organs such as in the head and neck. To minimize alignment errors the head and...master thesis 2018
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Rozene Vallespín, Alejandro (author)The resolution of ground-based telescopes is limited by the blurring caused by Earth’s turbulent atmosphere. Adaptive Optics (AO) is a technique used to correct atmospheric distortions, restoring images to diffraction-limited resolution. The main element of an AO system is the Deformable Mirror (DM), which compensates the distortions of the...master thesis 2018
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Kramer, Arnoud (author)In collaboration with the technical university of Twente, Leiden Probe Microscopy (LPM) has built an instrument to study thin film oxide growth during pulsed laser deposition (PLD). Thin filmed (perovskite) oxides have evoked an interest of material scientist, because they inhibit physical properties such as superconductivity, ferromagnetism,...master thesis 2018